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auxin Definition

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auxin
noun(aux-in)
any of various usually acidic organic substances that promote cell elongation in plant shoots and usually regulate other growth processes (such as root initiation): such as
auxin
noun(aux-in)
indoleacetic acid
auxin
noun(aux-in)
any of various synthetic substances (such as 2,4-D) resembling indoleacetic acid in activity and used especially in research and agriculture

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